Hydrogenerator



FIG. 1 is a right side view of a hydrogenerator showing my new design;

FIG. 2 is a perspective rear view thereof;

FIG. 3 is a perspective front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view thereof;

FIG. 8 is a left side view thereof;

FIG. 9 is a left side view of the hydrogenerator showing my new design in another position; and,

FIG. 10 is a right side view thereof. 

CLAIM The ornamental design for a hydrogenerator, as shown and described. 